diff --git a/src/PHPHtmlParser/Dom/Node/AbstractNode.php b/src/PHPHtmlParser/Dom/Node/AbstractNode.php
index 254ca31..a2c2927 100644
--- a/src/PHPHtmlParser/Dom/Node/AbstractNode.php
+++ b/src/PHPHtmlParser/Dom/Node/AbstractNode.php
@@ -154,9 +154,9 @@ public function id(): int
     /**
      * Returns the parent of node.
      *
-     * @return AbstractNode
+     * @return InnerNode
      */
-    public function getParent()
+    public function getParent(): ?InnerNode
     {
         return $this->parent;
     }